Heat-radiating device for internal-combustion motors.



No. 778,425. y PATENTBD DEC. 27', 1904.

. H. J. MUNTZ. HEAT RADIATING DEVICE FOR INTERNAL GOMBUSTION MoToRs.

APYLIOATION FILD JAN. 6, 1904.

in its outer surface.

UNITED STATES Patented December 27, 1904.

PATENT GEEICE.

HENRY J MUNTZ, OF POUGHKEEPSIE, NEW YORK.

HEATRADlATINe. DEVICE Fon lNTERNAL-oowieUsTloN wloToRs.

SPECIFICATION forming part of Letters Patent No. 778,425, dated December 27, 1904.

Application nea January 6,1904. serai No. 187,869.

vTo LZZ whom it may concern/r Beit known that I, HENRYJ. MUNTZ, a citi- Zen of the United States of America,residing at Poughkeepsie, in the county of Dutchess and State of New York, have invented certain new and useful Improvements in Heat-Radiating Devices, of which thefollowing is a specification. Y

This invention relates to improvements in heat-radiating devices for internal-combustion motors and other objects exposed to high tem-V peratures. The object of this invention is to improve and simplify the construction of devices of this character, and thereby render them more effective and durable in use and less expensive to produce.l Y

With this and other objects in view, which will appear as the nature of the invention is better understood, the same consists of certain novel featuresgof construction, combination, and arrangement of parts, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, which illus? trate .oneapplication of the invention, Figure 1 is a sideelevation of the cylinder of an internal-combustion motor or engine constructed in accordance with this invention. Fig. 2 is a transverse section through the same. Fig. 3 is a detail longitudinal section through' a Fig. 4 is a perspective View of a portion of one of the heat-radiating strips or blades. Figs. 5, 6,and 7 are similar views of modified forms of heat-radiating strips or blades. Y

In the embodiment of my invention illus trated in the drawingsY the numeral l denotes a motor or engine cylinder having a plurality of heat-radiating devices or projections 2 cast The said devices or projectlons 2 may be of any suitable construction,

but are preferably in the form of strips of some sheet metal which has a high coefficient of conductivity. Said strips are stamped or otherwise cut in the form of combs, the teeth 3 of which are united along one of their ends by a rib or back 4 and have their opposite or free ends cast in the outer surface of the cylinder or other object. The teeth 3 insteady of ings between the teeth of the two adjacent strips, so that air-'currentspassing through said openings in one strip will strike the teeth of the next strip. Instead of making straight strips they may be corrugated longitudinally or transversely, as shown at 6 in Fig. 6, in order to provide a greater heat-radiating surface and to allow for the difference in the expansion and contraction between the cylinder and strips and for shrinkage in casting, or they may be partly punched out and the punched piece bent out at an angle, as shown in Fig. 7 at 7. By casting the toothed edge of the combstrips in the cylinder due allowance is made for shrinkage in the casting, since the spaces between the teeth will prevent the buckling-which usually occurs when a solid strip of one kind of metal is cast in another, and, furthermore, the completed casting will be relieved of all strain which would be present should the back 4 of the combs instead of their teeth 8 be cast in the surface of the cylinder. By Ihaving the backs 4 upon the loutside a practically smooth ribbed surface is provided for the cylinder, which will enable it to be readily handled, and, moreover, by this arrangement of the backs 4 the greatest amount of heat-radiating surface is more directly exposed. 'As previously stated, this surface maybe increased by corrugating the backs 4 between the teeth, as seen in Fig, 6, or by partly punching out the space between the teeth and .bending this puncliedpart at an angle to the strip, thereby retaining all of the metal, which will give the greatest surface. Y

Heretofore it has been common to cut grooves or recesses in the surfaceV of the cylinder and then secure heat-radiating comb IOC) strips or pins by pressing them or screwthreading them into said grooves or recesses; but these means for securing the heat-radiating devices are both ineffective and expensive. By casting them in the surface in accordance With the present invention they become a part or' the cylinder, and the great saving in cost of production is obvious.

From the foregoing description, taken in connection With the accompanying drawings, it is thought that the mode of using the invention and the many advantages thereof will be readily understood without a more eX- tended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted without departing from the principle or sacrilicing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination with a cylinder for internal-combustion motors, ol`j inet-al coinh' strips having the VHaring ends ol their teeth cast in said cylinder, substantially as described.

2. The combination with a cylinder lor internal-combustion motors, or' a series ol combstrips disposed in parallel relation with the teeth of each strip opposite the spaces in the adjacent strips and having' the ends ol their teeth cast in said cylinder, substantially as described.

3. The combination with a cylinder for internill-combustion motors, of comb-strips olE sheet metal, having the metal between the teeth cut and punched only on one side, and bent at an angle with the strips, and having the ends of their teeth cast in said cylinder, substantially as described.

lVitnesses: Y

MYRoN A. (immun, H. Mnnnn LINDnnr. 

